prosody
1e65f64dfabf
util/serialization.lua

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util/serialization.lua @ 546:1e65f64dfabf

Added module util.serialization
author Waqas Hussain <waqas20@gmail.com>
date Thu, 04 Dec 2008 23:27:54 +0500
child 615:4ae3e81513f3
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546
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1 -- Prosody IM v0.1
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2 -- Copyright (C) 2008 Matthew Wild
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3 -- Copyright (C) 2008 Waqas Hussain
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4 --
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5 -- This program is free software; you can redistribute it and/or
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6 -- modify it under the terms of the GNU General Public License
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7 -- as published by the Free Software Foundation; either version 2
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8 -- of the License, or (at your option) any later version.
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9 --
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10 -- This program is distributed in the hope that it will be useful,
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11 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 -- GNU General Public License for more details.
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14 --
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15 -- You should have received a copy of the GNU General Public License
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16 -- along with this program; if not, write to the Free Software
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17 -- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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18 --
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19
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20 local string_rep = string.rep;
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21 local type = type;
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22 local tostring = tostring;
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23 local t_insert = table.insert;
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24 local t_concat = table.concat;
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25 local error = error;
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26 local pairs = pairs;
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27
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28 module "serialization"
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29
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30 local indent = function(i)
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31 return string_rep("\t", i);
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32 end
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33 local function basicSerialize (o)
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34 if type(o) == "number" or type(o) == "boolean" then
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35 return tostring(o);
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36 else -- assume it is a string -- FIXME make sure it's a string. throw an error otherwise.
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37 return (("%q"):format(tostring(o)):gsub("\\\n", "\\n"));
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38 end
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39 end
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40 local function _simplesave(o, ind, t, func)
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41 if type(o) == "number" then
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42 func(t, tostring(o));
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43 elseif type(o) == "string" then
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44 func(t, (("%q"):format(o):gsub("\\\n", "\\n")));
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45 elseif type(o) == "table" then
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46 func(t, "{\n");
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47 for k,v in pairs(o) do
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48 func(t, indent(ind));
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49 func(t, "[");
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50 func(t, basicSerialize(k));
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51 func(t, "] = ");
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52 if ind == 0 then
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53 _simplesave(v, 0, t, func);
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54 else
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55 _simplesave(v, ind+1, t, func);
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56 end
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57 func(t, ",\n");
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58 end
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59 func(t, indent(ind-1));
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60 func(t, "}");
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61 elseif type(o) == "boolean" then
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62 func(t, (o and "true" or "false"));
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63 else
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64 error("cannot serialize a " .. type(o))
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65 end
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66 end
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67
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68 function append(t, o)
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69 _simplesave(o, 1, t, t.write or t_insert);
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70 return t;
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71 end
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72
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73 function serialize(o)
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74 return t_concat(append({}, o));
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75 end
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76
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77 function deserialize(str)
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78 error("Not implemented");
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79 end
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80
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81 return _M;